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Valhalla is a luxurious mansion built at the expense of the capitalist Oden. The mansion is inspired by Norse mythology, and its complex structure is comparable to a maze. At the suggestion of two members of the Exploration Department of Beishen University, the members of the Exploration Department came to Valhalla to explore. They seem to have a harmonious relationship, but in fact they each have their own hidden agendas. When they were playing hide and seek, the first deceased appeared...

Aiwei, a genius scholar in the field of artificial intelligence, was unfortunately swallowed up by a fire. He left two AIs to his son Aiosuke - detective Xiangyi and prisoner Yixiang. Yi Xiang specializes in committing crimes, while Xiang Yi solves the truth of the case. As twin AI sisters, they continue to grow by fighting against each other. The terrorist organization that suddenly appeared has kidnapped Yi Xiang and continues to create puzzling mysteries. In order to track down the cause of death of his parents, Fu Yuxiang opened an artificial intelligence detective agency - can the detectives with deep learning successfully solve these cases...

Aiwei, a genius scholar in the field of artificial intelligence, was unfortunately swallowed up by a fire. He left two AIs to his son Aiosuke - detective Xiangyi and prisoner Yixiang. Yi Xiang specializes in committing crimes, while Xiang Yi solves the truth of the case. As twin AI sisters, they continue to grow through battles. After a duel with a terrorist organization, Xiang Yi's ability was recognized, but his whereabouts are still unknown. A naked male corpse is discovered on the coast of Tsushima. The deceased turned out to be the son of the current Japanese Prime Minister, and various clues indicate that Ixiang is related to the murder. As an AI consultant assisting the police in the investigation, Xiang Yiyufu was invited to the Prime Minister's official residence. What kind of showdown will the twin sisters face...